Chapter 160

RCF = g is the relative centrifugal force, expressed by gravity, that is, the multiple of gravitational acceleration.

The RPM can be obtained when the motors R and G are known; Conversely, if R and RPM are known, G can also be obtained.

For example, take the known R radius value on the R scale and the known relative centrifugal force value on the G Scale, and the extension of the line between the two points is rpm at the intersection of the RPM scale.

If the known g value is on the right side of the G Scale, the value on the right side of the RPM scale shall be read, otherwise it is vice versa.

G and RPM can also be converted by the following formula:

RCF=1.119 × one hundred and five × rx（rpm）2

Relationship between centrifugal force g and speed Rmin of motor:

Centrifugal force (f);

Centripetal force causes an object to be attracted or repulsed towards a central point or any action inclined to that point.

Centrifugal force can be explained as a tendency of an object to maintain its "limited amount".

The difference between them is that the centripetal force is in the inertial reference frame, while the centrifugal force is in the non inertial frame.

Formula: F = m ω 2r

ω： Rotational angular velocity (radians / s);

r: Distance between rotating body and rotating axis (CM);

m: Particle mass;

Relative centrifugal force (RCF);

RCF is the multiple of the actual centrifugal force converted into gravitational acceleration;

G is gravity acceleration (9.80665ms2)

The same rotation is equal to 2 π radians in one revolution, so the angular speed of the rotor is expressed in the number of revolutions per minute (revolutions per minute n or Rmin):

Centrifugation is expressed in R / min.

Calculation formula of separation factor:

RCF = f centrifugal force / F gravity = m ω? 2rmg= ω? 2rg=（2＊π＊rr＊rpm）? 2＊rg

Note: RPM should be converted into rpm

For example, a motor with a diameter of 1000mm and a speed of 1000 rpm,

The separation factors are:

RCF（1000）=（2＊3.1415＊16.667）^2＊0.59.8

=104.72^2＊0.59.8

=560

So

G=？

When g = 1500, the theory can cut any metal known.

The centrifugal force will not change.

Of course, the premise is that the strength of the bit is sufficient.

From to:

1500=r × eleven point one eight × 10-6 ×( rpm)2；

Results can be obtained:

When the drill clamp diameter is 50mm

RPM = 60000.

Liu Chi's hand moves at high speed on the keyboard and wants 60000 rpm, which is also a very big problem, especially on a motor with a diameter of only 200mm.

Therefore, Liu Chi decided to cancel the power generation device and use DC directly.

Magic change again.

......

Time flows like water.

"Bell, bell, bell..." a burst of telephone ringing interrupted Liu Chi who was doing the experiment.

"Hello?"

"Liu Chi, the last time you asked us for help, it has come to an end." The voice of Chen Luguang's invitation for credit came into Liu Chi's ears from his mobile phone.

“？” Liu Chi couldn't think of what happened last time.

"Why?"

"What happened last time?"

"It's about your disciple Zhou Meng. Why did you forget it in such a little time?" Chen Luguang asked back.

"I'm doing an experiment. I don't remember at once. What's the matter? Is there any hope? " Liu Chi returned to his senses and pressed his heart.

"There is a plan at Kong X General Hospital. After discussion, the success rate reaches 75%."

"Really, that's great. Do I have anything to prepare?" Liu Chi asked happily.

"Ask Zhou Meng to go over and check it in person to confirm whether it is different from the case form. If the error is too large, she has to consult again."

"When will you go?" Liu Chi asked anxiously.

"At your time."

"The sooner the better."

"You can go there when you're ready. I'll give you a call. You can go straight to her." Chen Luguang said, "I've explained it to her."

"OK."

"1391235xxx, Zhang Miao, is the vice president of Kong X General Hospital."

"OK, I'll contact her later."

"OK, if you have any questions, please feel free to contact me."

"Good!"

"..." after Liu Chi hung up the phone, he thought about it. Finally, he stopped his work and called Zhou Meng: "girl, where is it?"

"I'm in my sister-in-law's office." Zhou Meng's crisp voice came from his mobile phone.

"You free up your time tomorrow and go to the X General Hospital with me." Liu Chi said directly.

"What are you doing at the empty x general hospital?" Zhou Meng asked suspiciously.

"Don't you want to be a beautiful little sister?" Liu Chi half joked.

"..." after a while, Zhou Meng came out again with a trembling voice: "can you do it?"

"According to your previous case table, the success rate is 75%." Liu Chi comforted: "don't worry, it should be no problem. Brother Chi smashed it with money. We don't lack money."

"Well, thank you, brother Chi." Zhou Meng nodded heavily.

"Well, that's it. Take advantage of your time today to deal with all the things you have to do these days. Although you go to check tomorrow, the time may not be short."

"I have something to do recently. I may not be able to come back in a short time."

"Brother, where are you going?"

"For the above projects, go to tackle key technical problems, and leave after brother Chi handles the things on his head. It's urgent over there."

"Mm-hmm!"

"That's it. I'll contact xiakong x general hospital first."

“......”

Liu Chi hung up Zhou Meng and dialed Zhang Miao.

"Hello!" After the bell rang seven or eight times, a middle-aged woman's slightly old voice came into Liu Chi's ears.

"Hello, is this academician Zhang Miao Zhang of Kong x general hospital?" Asked Liu Chi.

"I'm Zhang Miao?"

"Hello, well, I'm Zhou Meng's brother." Liu Chi explained simply and said, "just now my friend told me that the markings on her face can be cured in your hospital. He asked me to contact you."

"Hello, Hello, Zhou Meng's case has been discussed by our experts for many times. If you provide case data, you are still very confident that it will be cured." Zhang Miao became enthusiastic in an instant.

"That's great, thank you." Liu Chi thanked.

It's not strange to be polite!

Anyway, thank you first!

Not without a piece of meat.

"You're welcome. There is a great possibility of cure, but because the case files you provided are not our own files, it's best to let her come to our hospital for a comprehensive examination in person, so as to decide which method to choose."

"I know. My friend told me just now. Is tomorrow convenient? If it's convenient, I'll take Zhou Meng to have an examination tomorrow. " Liu Chi said anxiously.

"Yes, you can go directly to kongx general hospital. Just call me when you arrive. The address is West Diaoyutai, Haidian District. Do you know how to get there?"

"Yes, I'll be there tomorrow morning and I'll be there at about 10 o'clock."

"OK, no problem... You'll contact me then."

"Thank you, Dean Zhang."

“......”

After Liu Chi hung up the phone and confirmed that there was nothing to explain, he continued to modify the motor.

After work in the afternoon, Liu Chi told ye Yuxin about taking Zhou Meng to Kong x general hospital tomorrow.

The next day, Liu Chi took the two and went straight to Kong X General Hospital.

Nine fifty.

Liu Chi met vice president Zhang Miao.

It is a middle-aged woman about 1.8 meters tall, dressed in white and looking rich.

"Hello, president Zhang. This is Liu Chi." Liu Chi smiled and shook hands with Zhang Miao.

"Hello, Mr. Liu." Seeing that Liu Chi was so young, Zhang Miao glanced at the license plate and looked at the other two. She took a breath. Which big man's relative is this?

Don't be so high-profile.

Aren't you afraid that netizens will shoot you online and spray you to death?

But it seems wrong to think about it.

If it is a relative of a big man, it should be impossible for the top to intervene directly, and it is impossible to drive a car with this license plate.

Such a car doesn't drive if you want to.

"This is my daughter-in-law Ye Yuxin. This is Zhou Meng." Liu Chi said.

"Hello, president Zhang." Zhou Meng is clever.

"Hello." Ye Yuxin nodded with a smile.

"You're welcome. There are many people. Talk to me in my office." Zhang Miao was not a person who had never seen the world. He stopped his doubts, calmed down quickly and took the three back to his office.

“......”

"Mr. Liu, if there is little difference between Zhou Meng's condition and the files provided by you, we are sure to cure it." After Zhang Miao asked the three to sit down, each poured a glass of water and said.

"That's troublesome for hospital director Zhang." Liu Chi said after drinking a mouthful of water.

"I now let the attending doctor Li Yuhong come over and ask her to take Zhou Mengxian for a new examination to determine what method to treat."

"Thank you."

Zhang Miao picked up the phone on the desk and said a few words.

Five minutes later.

A slim woman doctor, nearly 1.7 meters tall, wearing a big mask and wearing white clothes, walked into Zhang Miao's office.

"Dean Zhang, are you looking for me?"

"Director Li, this is Zhou Meng. Please take her for a comprehensive examination first." Zhang Miao pointed to Zhou Meng.

"OK." Li Yuhong saw three people in her eyes. A trace of surprise flashed in her eyes and nodded: "your name is Zhou Meng, isn't it?"

"Yes!" Zhou Meng nodded honestly, and his eyes involuntarily floated to Li Yuhong.

"Director Li, please." Liu Chi hurriedly stood up and said politely.

"It doesn't matter, the doctor's parents' heart. Such a lovely little girl has a bar on her face. It's really a little outrageous. Don't worry, we will find a way to cure it." Li Yuhong looked at Zhou Meng, who was clever and acceptable, narrowed her eyes and smiled.

"Thank you, director Li."

"I'll take Zhou Meng to check first. The time can be longer, about four or five hours. If there's anything you can do first, you can pick up Zhou Meng at that time." Li Yuhong explained.

"OK."

After Zhou Meng was taken away, Liu Chi chatted with Li Miao for a few minutes, then left and prepared to go out and come back at that time.

You can't wait here for four or five hours.

And people are busy, but they don't have time to work with themselves.

......

An office.

"Dean, I have arranged director Li Yuhong to preside over the treatment of Zhou Meng's case and try my best to cure it." Zhang Miao said.

"Is it worth it? With such a large resource? " An old man nearby asked a little dissatisfied.

"Academician Chen, it was directly assigned above. In fact, this case file is not only obtained by our hospital, but also by the University of science and technology, Peking Union Medical College and Yanjing Medical College... As long as it is a hospital above grade three." Zhang Miao turned back and explained to the boss.

"What???" The old man was stunned. It was a little incredible. Zhang Miao opened his mouth and didn't say anything at last.

"I don't know who Liu Chi is, but his identity is definitely different. He just came to three cars. His driving brand is Jing v0002x, and the other two are 115116."

"If I guess correctly, it should be opened by the bodyguard."

"..." a breath sounded in the conference room.

"The background is hard?"

"Probably not."

"Well, don't discuss it. This time it's the task arranged above. Go all out and cure the patient at all costs." At this time, the Dean Wang Han, who had been silent, directly interrupted the discussion.

"Dean?"

"..." several people in the conference room turned their puzzled eyes to Wang Han.

Wang Han looked around and stared at himself one by one. It seemed that she couldn't explain clearly. She said, "the woman is only 18 years old. She is a computer doctoral student of X bridge University. She has just obtained her diploma, and her family has emigrated, but she retains her nationality."

"She's only 18?"

"Doctor of computer science at x bridge University at the age of 18?" The old man was a little silly: "have you graduated yet? Such a genius? "

"Yes, just got her diploma and came back right away, which shows her patriotism. This is enough for us to try our best to cure others."

"Are you sure?"

"OK!"

"Then I have no problem." The old man put away his mind.

Wang Han looked at the old man and finally said, "you are not in the scientific and technological community. You don't know the influence of Liu Chi. Because of the need for confidentiality, you don't need to know for the time being. If you want to compare, his importance is above me."

"You heard the license plate president Zhang said just now. This is the security specification given above. It is his importance to the scientific and technological community, not his background."

"I see." Hearing Zhang's words, two dissatisfied people swept away in an instant.

“......”

Five hours later, Liu Chi returned to Kong X General Hospital on time.

"How about Dean Zhang?" Liu Chi looked at Zhang Miao holding the inspection report and looked at Zhou Meng with happy eyes. He had a spectrum in his heart and asked.

"The difference is not big, and it is better than we thought. The successful cure rate is very high." Zhang Miao looked at Zhou Meng and finally said to Liu Chi.

"Really?" Liu Chi's face flashed with joy.

"Yes!"

"That's great, girl. See? Don't worry now. You can tie your hair up in the future." Liu Chi happily said to Zhou Meng.

"Mm-hmm!" Zhou Meng's eyes began to mist.

"Well, all grown-ups want to cry? My sister-in-law will laugh at you later. " Liu Chi made up the past with a knife and directly dyed Zhou Meng's face with red powder. He was embarrassed and wanted to hit someone.

"Sister in law, you see brother Chi bullying me again."

"I'll help you clean him up later." Ye Yuxin stroked the green silk of next week's dream: "treat it well. My sister-in-law will take you back to play."

"Thank you, sister-in-law!"

"Dean Zhang, when do you think it is appropriate to start treatment? What can we do for you? " Liu Chi glanced at the two women who were whispering, and finally turned his eyes to Zhang Miao.

"Don't prepare anything. You can start treatment as long as you are ready. Do you have anything to deal with? After all, the treatment time will not be short. "

"..." Liu Chi turned to Zhou Meng and said, "what about you, girl? What's the problem?"

"No." Zhou Mengzhi nodded.

"By the way, Dean Zhang, how long will this treatment take?"

"It depends on the recovery, but it is conservatively estimated that the hospital stay is about 15 days, and there should be a recovery period of about a month later. We should come to the hospital for examination regularly." Zhang Miao thought about the sidewalk.

"Zhou Meng, discuss it with your parents in the evening."

"Dean Zhang, what about the cost?" Ye Yuxin, who has been silent, spoke.

"The cost is estimated to be very high. You should be prepared."

“？” Liu Chi turned his head and looked at Zhang Miao.

"It should exceed 500000."

"So much?" Zhou Meng shrunk his neck.

"Nothing." Ye Yuxin looked at Zhou Meng and said, "with your brother and sister-in-law, you can treat it at ease."

"Yes."

After communicating with Zhang Miao for half an hour, Liu Chi decides to bring Zhou Meng to start treatment the day after tomorrow and leave it to Zhou Meng to deal with some private affairs tomorrow.

After confirming that there was no problem, Liu Chi left with Ye Yuxin and Zhou Meng.

At night, Zhou Meng hid under the bed, picked up his cell phone and called his mother Jiang XueYue far away in Europe!

"Mom!"

"Girl, miss your mother?" Jiang XueYue asked with concern, "are you used to it at home? Have you been wronged? "

"No, brother Chi and his sister-in-law are very kind to me." Zhou Meng rolled over and hummed a few words.

"That's good. Last time your father said you lived directly at Liu Chi's house. Is it convenient?" Jiang XueYue asked.

"It's convenient. Brother Chi's parents recognize me as a daughter." Zhou Meng raised his neck and said proudly.

"That's good, just get used to it." Jiang XueYue turned her head and said, "is there no money?"

"Yes or no."

"Really?"

"Yes." Zhou Meng nodded and said, "Mom, let me tell you something."

"What's up?"

"Brother Chi helped me find a relationship. He said he could cure the scar on my face and treat it the day after tomorrow. At that time, he may not be able to call you and dad for a long time."

"Can it really be cured?" Jiang XueYue frowned.

"Really, brother Chi took me to check today and said that there was a great chance that it could be cured, over 70%."

"Which hospital?"

"Empty X General Hospital." Zhou Meng showed off a little.

"Really? Does Liu Chi have a relationship there? "

"Really."

"The cost should be very expensive?" Jiang XueYue added, "as long as you can cure your face, you don't have to worry about the medical expenses. Parents will find a way."

"Brother Chi has helped solve the medical expenses."

"How can this be? Don't worry. My parents will find a way. Originally, I wanted to wait another year. When my parents earn enough money, I'll let you treat in Europe. I didn't expect you to run back to China now."

"About 500000. Don't worry. This money is drizzle for brother Chi." Zhou Meng added: "besides, I'm his apprentice and sister. When I'm cured, I'll work in brother Chi's company."

"Only 500000?" Jiang XueYue was surprised and was stunned for a while before asking, "really? Only 500000. You didn't lie to your mother. "

"Well, what Dean Zhang said in front of brother Chi, about 500000." Zhou Meng must be authentic.